Anyone else completely irritated with "I did my best?"

May be triggering just fyi. My mom is the absolute worst. Im 46 and have just come to understand what I experienced in childhood was abuse. Emotional abuse. My parents neglected me and my 3 other siblings. I was the parent at 8 getting a newborn ready for daycare. I cannot even fathom my own children, 7/9 caring for one another much less a newborn. When me and siblings confronted my mother with her lack of empathy, parenting and love this year, her answer was I did my best. Oh well. no apologies. No im sorry you feel that way. She is also a narcissist and continues to be the absolute worst. So, anyone else completely irritated with " I did my best?"